https://www.mercurynews.com/2020/06/20/coronavirus-contra-costa-records-most-new-cases-ever/

Contra Costa County reported 92 new COVID-19 cases on Saturday, the most ever reported in a single day in the county. That comes on a day where at least four Bay Area counties reported no new fatalities from the virus.

Contra Costa County’s 92 new COVID-19 cases bring its total to 2,240 cases. The second-highest single day case total in the county was on June 9, when the county reported 68 new cases. On Friday, the county also reported the most tests ever — 2,448, after reporting 2,016 new tests on June 19. The number of positive tests ticked up slightly to 3.2 percent. It’s not clear how many of the tests reported on Friday were positive.